20311230223 has 8 divisors (see below), whose sum is σ = 21382705520. Its totient is φ = 19240001280.

The previous prime is 20311230193. The next prime is 20311230259. The reversal of 20311230223 is 32203211302.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 20311230223 - 2¹³ = 20311222031 is a prime.

It is a super-3 number, since 3×20311230223³ (a number of 32 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 20311230223.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20311230283) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 121663 + ... + 235423.

It is an arithmetic number, because the mean of its divisors is an integer number (2672838190).

Almost surely, 2^20311230223 is an apocalyptic number.

20311230223 is a deficient number, since it is larger than the sum of its proper divisors (1071475297).

20311230223 is a wasteful number, since it uses less digits than its factorization.

20311230223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123177.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 20311230223 its reverse (32203211302), we get a palindrome (52514441525).

The spelling of 20311230223 in words is "twenty billion, three hundred eleven million, two hundred thirty thousand, two hundred twenty-three".